Skid-lifting device.



Patented m 16, 1911.

4 BHEETSSHEET 1.

IN VENT'OR wflk'm 4.064%

ATTORNELYS.

1W17'NEssEs W. H. KRATSGH.

SKID LIPTING DEVICE.

APPLICATION FILED MAR.13,1909.

992,212, Patented May 16,1911.

4 SHEETS-SHEET 2.

.INVENTOR I fl W {TNESS 2 ATTORNEYS W. H. KRATSCH.

SKID LIFTING DEVICE.

APPLICATION FILED MAR. 1a, 1909.

U m a 9 m m T a M M M m n .n m E o z I I l l IIIL M m .1 m H .n I n m um i R W. H. KRATSGH.

SKID LIFTING DEVICE,

APPLICATION IILED MAR.13, 1909.

Patented May 16, 1911.

4 SHEBTS-SHEET 4.

INVENTOR WITNESSES ,4 TTOKNL Y6 UNl'ftllD STA Eli-l PATENT @FFTCE.

WILLIAM H. KRATSCH, OF OSHKOSsH, WISCONSIN, ASSIGNOR TO CHALLONERCOMPANY, OF OSHKOSH, WISCONSIN, A CORPORATION OF WISCONSIN.

SKID-LIFTING DEVICE.

Specification of Letters Patent.

Application filed March 13, 1909.

Patented May 16, 1911.

Serial No. 483,171.

To all whom it may concern:

lie it known that I, \Vnmu )I ll. Kavrscu, a citizen of the UnitedStates, residing at Oshkosh, county of Winnelmgo, and State ofWisconsin, have invented new and useful Improvements in Skiddn't'tingDevices, of which the following; is a specification.

My invention relates to improveuu-nts in skid lifting devices for lo;loading and turning machines.

The object of my invention is to provide automatic means for lifting theskids preparatory to the. loading operation, in which the operation ofthe log loading means w ll be dependent upon the operation of the skidlifting means, or the two mechanisms rendered so interdependent thatthey can be operated in sequence through the medium of a singlecontrolling lever, and preferably through a single operation of suchlever.

In the following description. reference is had to the accompanyingdrawings, in which- Figure 1 is a perspective View of a log loading andturning machine embodying my invention. Fig. 2 is a plan view of aportion of such machine, showing the steam cylinders and the arrangementof the pipe connections for the auxiliary or skid lifting cylinder. Fig.3 is a side view of the auxiliary or skid lifting cylinder and its skidlifting connections. Fig. 4 is a side view of the log loading cylinder,with the valve casing and a portion of the cylinder partially brokenaway to show the arrangement of the ports. F ig. 5 is a detail plan viewof a portion'of the log loading cylinder, showing the main steamcontrolling valve casing and ports in horizontal section.

Like parts are identified by the same reference characters throughoutthe several views.

My invention is illustrated as applied to a log loading machine of thetype kn wn as the .Simonson log loader and turner, which a rockingengine cylinder A is em ployed to oscillate a rock shaft C by means ofpiston roda and arm d, thus swinging the log loading arms D andE,-another steam cylinder B being employed to operate a 16g turning hookF. These general featunes are all-shown and described in U. S. .patents'to Simonson, numbered 408,7 60, and 448,593, and are therefore notherein more specifically described.

'tral passage 31 in the valve.

The skids G are ordinarily supported at the ends nearest the carriage IIby means of blocks l and cams J, which are mounted to oscillate upon therock shaft 0. in my improved structure, these cams are free to oscillateindqiendently oi the shaft C and are actuated from a hack shaft 1through arms 1? which are .t'ast thereon, links 3. and arms 4, thelatter being connected with the respective cams. The cams, in oneposition, support the skids at or a little above the level of thecarriage H, and in another position permit the skids to drop below suchlevel at the, ends adjacent to the carriage.

The back shaft 1 is actuated from the auxiliary cylinder 6 through itspiston rod 7, connectinp rod 8, and a crank arm 9 carried by the backshaft. A steam controlling valve at 11 is adapted to admit steam to theinner end of cylinder 6, through port 12, flexibly jointed pipe 13,coupling member 14, and pipe 16. When actuated in the other directionfrom normal position, this valve admits steam to the other end ofcylinder 6 through port 15, flexibly jointed pipe 17, coupling member 14and pipe 18. The c0ntrolling valve is actuated from a lever 20, througha rod 21, bell crank 22, rod 23, lever 24-, and valve stem 25, wherebythe valvemay be adjusted to admit steam to either of 35 the pipes 13 or17, or to a central closed or normal position.

The steam cylinder A is provided with steam passages 27 and 28 along itsunder side, the passage 27 leading from port 12 to the outer end ofcylinder A, and the passage 98 leadinp; from port 15 to the inner end ofcylinder A, viz:-thc end nearest the carriage. When in normal position,as shown in Fig. 5, both ports 12 and 15 may be respectively open to anexhaust passage 29 past the end of the 'valve and through a cen- In theother positions one port is open to the exhaust and the other to thelive steam.

Valve 30 is actuated from the piston rod 7 of the auxiliary cylinder,through the co'nnet-ting rod 8, back shaft 1, crank 35, rod 36,

elbow crank 37, rod 38, crank 39, and valve stem 40, the elbow crank 37being mounted to oscillate upon a shaft 41, u on cylinders A and B arepivoted. The crank 35 is slidingly connected with the rod 36, with stops42' and 43 limiting its free motion;

which the I so that rod 36 is only actuated during the final movement ofthe crank in either direction. It will therefore be observed that theadmission of steam to the outer end of cylinder A is dependent entirelyupon the movement of piston 45 in the auxiliary cylinder. The outwardmovement of this piston first lifts the skids, and as this movement iscompleted, the valve is actuated to admit 'steam to the outer end ofcylinder A and thus actuate the log loading arms. Conversely,aretractive movement of the piston d5 in the auxiliary cylinder firstlowers the skids and then closes valve 30, the steam in cylinder Ahaving in the meantime passed baclmvardly to port 12 and the exhaust; Itis not-material whether the admission of steam to the inner end ofcylinder A is similarly controlled or not, since in the retractive'movement, the skids may be lowered, either before or after the operationof the arms D and E.

By adjusting the stops 42 and 43 on therod 36, the admission of steam tocylinder A throrgh valve 80.n1ay be made to take place at any desiredperiod during the stroke .of piston A5. The admission of steam-tocylinder B is independent of the auxiliary or skid lifting cylinder, butis preferably controlled through a movement of the same manuallyactuated lever, which is pivoted to a rock shaft and when swunglaterally, rocks this shaft and transmits motion through a crank arm. 51and rod 52 to a valve stem to operate a valve at 54 con trolling theadmission of steam to cylinder permitted to remain in a stationaryposition. while the casing of the controlling valve rocks with thecylinder A. It is not mate rial to this invention, how the several.cylinders are placed nonsvhat connections are used to transmit motionfrom their respective pistons to the skids. The only essential featureof the construction is that the operation of the log loading means ismade dependent upon the prior operation of the skid lifting or adjustingmeans.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1 In a log loader provided with skidlifting devices, the combination with fluid operated loading means, ofan auxiliary fluid chamber, a movable member therein operativelyconnected with the skid lifting devices, and means, operated from saidmovable member, for controlling the delivery of fluid to the log loadingmeans.

2. In a log loader provided With movable skids, the combination with logloading mechanism, of fluid actuated skid lifting devices, and means,operatively connected therewith, which actuates the log loadingmechanism after the initial skid lifting movement.

8. In a log loader provided with movable skids, the combination withskid lifting cams, and swinging log loading arms, of

actuating mechanism for the skid lifting cams, other actuating mechanismfor the log loading arms, and means, connected with the cam actuatingmechanism, for'controlling the operation of the log loading mechanism,whereby said skid lifting and log loading operations are performed insequence.

4-. In a log loader provided with movable skids and log loading devices,the combinaton of a log-loading motor, and a skid lifting motor, amanually actuated lever controlling the operation'of the lastmentionedmotor, and connections for transmitting power from said motorto control the oper ation of the log loading motor.

5. In a log loader provided with movable skids and log loading devices,the combination of a cylinder and piston for operating the log loadingdevices, another cylinder and piston for lifting the skids,- a mainvalve. controlling the admission of motive fluid to both cylinders,another valve also controlling the admission of motive fluid to the logloading cylinder, and connections for actuating said last mentionedvalve from the piston of the skid lifting cylinder.

6. In a log loader provided with movable skids and log loading devices,the combination of a cylinder and piston for operating the log loadingdevices, another cylinder and piston for lifting the skids, a main valvecontrolling the admission of motive fluid to both cylinders, anothervalve also controlling the admission of motive fluid to the log loadingcylinder, and connections for actuating said last mentioned valve fromthe piston of the skid lifting cylinder, together with a manuallyactuated lever for adjusting the first mentioned valve.

7. 2111 a log loader provided with movable skids and log loadingdevices, the combination of a cylinder and piston for operating the logloading devices, another cylinder and piston for lifting the skids, amain valve controlling the admission of motive fluid to both cylinders,another valve also controlling the admission of'motive fluid to the logloading cylinder, and connections for actuating said last mentionedvalve from the piston of the skid lifting cylinder,

together with a manually actuated. leverfor adjusting the firstmentioned valve, and a log turning mechanism, a cylinder and pis- .tonfor operating the same, a valve controlling the admission of motivefluid to said cylinder and independent connections with said manuallyactuated lever for operating said valve, said connections being adaptedonly for the transmission of lever movements of a different characterfrom those which actuate the valve controlling the skid lifting and logloading mechanism.

8. In a log loader, the combination with -a set of movable skids, and aset of swing ing log loading arms, of fluid receiving cylinders, apiston in one of. said cylinders operatively connected with the logloading arms, a piston in another of said cylinders, suitable devicesoperatively connected therewith and adapted to lift the skids, and asingle manually actuated device arranged by movement in one direction tocontrol the admission of fluid, first to one of said cylinders and thento the other.

9. In a log loader, the combination with a set of movable skids, and aset of swingin log loading arms, of fluid receiving cylin ers, a pistonin one of said cylinders operatively connected with the log loadingarms, a piston in another of said cylinders,-

ally actuated device and its connections being arranged to necessarilyadmit said fluid, first to the cylinder containing the skid liftingpiston and then to the other of said cylinders' In testimony whereof Ialfix my signature in the presenceof two witnesses.

WM. H. KRATSCH. Witnesses:

EDWARD J. DEMIBEY, BART W. Hniss.

